CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - Non Agency Residential Mortgage Backed Securities And Securitized Loans - Variable Interest Entity, Primary Beneficiary - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest income, Assets of consolidated VIEs	$ 678,623	$ 575,715	$ 428,992
Interest expense, Non-recourse liabilities of VIEs	$ 249,708	$ 191,922	$ 119,103